If you want to step more away from that sweet, Negroni-like profile, and for an extra layer of flavor, I'd suggest splitting the red bitter liqueur to allow for that darker taste of coffee liqueur. So try 3/4 oz red bitter liqueur and 1/4 oz coffee liqueur.
This was good and added a nice subtlety to the cousin Negroni. The cognac vs the gin drew more of the fruit out of each of the sweet vermouth and the Campari. I do like it, but not sure I would run to this when after this flavour profile.
Very nice addition to my repertoire of equal parts cocktails! I think the Vermouth is key to how sweet it is. I used Vermut Lustau, which is a nice Spanish vermouth.